:root{--bg: #f6f7f9;--panel: #ffffff;--text: #1d2330;--muted: #7a8194;--accent: #3a6df0;--accent-soft: #e8eefc;--danger: #d64545;--success: #2e9e5b;--border: #e3e6ec;--radius: 10px;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-size:15px}h1,h2,h3{margin:0 0 12px}a{color:var(--accent)}button{border:none;background:var(--accent);color:#fff;border-radius:var(--radius);padding:8px 14px;font-size:14px;cursor:pointer}button:hover{filter:brightness(1.06)}button:disabled{opacity:.5;cursor:default}button.ghost{background:transparent;color:var(--muted);padding:6px 8px}button.ghost:hover{color:var(--text);background:var(--accent-soft)}input,select,textarea{border:1px solid var(--border);border-radius:var(--radius);padding:8px 10px;font-size:14px;font-family:inherit;background:#fff;color:var(--text);width:100%}label{display:flex;flex-direction:column;gap:4px;margin-bottom:12px;font-size:13px;color:var(--muted)}fieldset{border:1px solid var(--border);border-radius:var(--radius);margin:0 0 14px;padding:10px 12px}legend{font-size:13px;color:var(--muted);padding:0 6px}.row{display:flex;gap:8px;align-items:center}.muted{color:var(--muted)}.error{color:var(--danger);font-size:13px}.success{color:var(--success);font-size:13px}.centered{min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:24px;text-align:center}.layout{display:flex;min-height:100dvh}.sidebar{width:240px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:14px 10px;gap:10px}.sidebar-header{display:flex;justify-content:space-between;align-items:center;padding:0 6px}.logo{font-weight:700;font-size:18px;color:var(--accent)}.icon-link{text-decoration:none}.category-list{display:flex;flex-direction:column;gap:2px;overflow-y:auto}.category-link{display:flex;gap:8px;align-items:center;padding:8px 10px;border-radius:var(--radius);text-decoration:none;color:var(--text)}.category-link:hover{background:var(--bg)}.category-link.active{background:var(--accent-soft);color:var(--accent);font-weight:600}.category-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.add-category{align-self:flex-start}.add-category-form{display:flex;flex-direction:column;gap:6px;padding:0 6px}.sidebar-footer{margin-top:auto;display:flex;justify-content:space-between;align-items:center;padding:0 6px;font-size:13px}.main{flex:1;padding:20px;max-width:760px}.banner{background:#fff7e0;border:1px solid #f0dfa8;border-radius:var(--radius);padding:10px 14px;margin-bottom:16px;display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:14px}.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:18px}.panel-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.panel-header h2{margin:0}.quick-add{display:flex;gap:8px;margin-bottom:14px}.quick-add input{flex:1}.quick-add button{white-space:nowrap}.item-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}.item-row{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--radius);border:1px solid transparent}.item-row:hover{border-color:var(--border);background:var(--bg)}.item-row input[type=checkbox]{width:18px;height:18px;flex-shrink:0}.item-row.done .item-title{text-decoration:line-through;color:var(--muted)}.item-body{flex:1;display:flex;flex-direction:column;align-items:flex-start;gap:2px;background:none;color:inherit;text-align:left;padding:0;border-radius:0}.item-body:hover{filter:none}.item-title{font-size:15px}.item-desc{font-size:13px;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.item-meta{display:flex;gap:10px;align-items:center}.item-deadline{font-size:12px;color:var(--muted)}.item-deadline.overdue{color:var(--danger);font-weight:600}.item-reminders{font-size:12px;color:var(--accent)}.empty{padding:16px 0;text-align:center}.done-section{margin-top:14px}.done-list{margin-top:6px}.modal-backdrop{position:fixed;inset:0;background:#14182373;display:flex;align-items:center;justify-content:center;padding:16px;z-index:10}.modal{background:var(--panel);border-radius:var(--radius);padding:20px;width:100%;max-width:460px;max-height:90dvh;overflow-y:auto}.modal-actions{margin-top:8px}.reminders .reminder-list{list-style:none;margin:0 0 8px;padding:0;font-size:14px}.reminders .reminder-list li{display:flex;align-items:center;gap:6px;padding:2px 0}.reminder-add select,.reminder-add input{width:auto;flex:1}.settings{max-width:420px}.login-page h1{font-size:42px;color:var(--accent);margin:0}@media(max-width:720px){.layout{flex-direction:column}.sidebar{width:100%;flex-direction:column;border-right:none;border-bottom:1px solid var(--border);padding:10px}.category-list{flex-direction:row;overflow-x:auto;padding-bottom:4px}.category-link{white-space:nowrap;flex-shrink:0}.sidebar-footer{margin-top:0}.main{padding:12px}}